What to do if an Angry BF Shows Up?

I haven't been in that situation nor do I want to be, but I get the feeling it will inevitably happen one day. Now what would you experienced PUAs do if an angry BF shows up trying to start trouble? Naturally, I would like to knock that dood out but I figure that isn't the best move to make.

alright heres my story. im at a bar, fairly drunk, and not paying attention to my surroundings. well the girls but not who they're with. so i see this HB8 or so and i start talking to her, and shes pretty much digging it. we touch on a few topics, one being weddings Not entirely sure when, but all of a sudden this big dude comes up. really mad and is like "thats my girlfriend" i responded with a simple "i know" ...long story short, i isolated him from the girl, and basically used what i had learned in my convo with her to manipulate him into liking me. this lead to the bf buying 5 rounds of SOCO shots . and me getting the girls number.

just spin it so it looks like your the good guy and he's the bad guy for "attacking" you. all else fails a swift kick to the baby maker would work well too